The FLP-1740 from Marki Microwave is a Low Pass RF Filter with Frequency DC to 16 GHz, Stopband Frequency 20.5 to 48 GHz, 3 dB Cutoff Frequency 17.4 GHz, Insertion Loss 0.9 dB, Rejection 25 to 50 dB. Tags: Module with Connector. More details for FLP-1740 can be seen below.